**Instructions for Purchasing Electric and Pneumatic Screwdrivers**
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Electric screwdrivers, also known as electric screwdrivers, are power tools designed to tighten or loosen screws. These devices come with a torque adjustment and limitation mechanism, making them ideal for assembly line applications. They consist of three main components: electronics, motor, and mechanical parts. Due to their high precision and efficiency, they have become essential in the manufacturing and assembly industry. The sources of these products can be either domestic or imported, and they operate on AC high voltage or DC low voltage. Pneumatic screwdrivers, also referred to as air screwdrivers, wind guns, or pneumatic drivers, are powered by compressed air. They are used for tightening and loosening nuts and bolts. Some models feature adjustable and limited torque settings, known as fully automatic torque-adjustable pneumatic screwdrivers. Others only have a switch knob to control airflow, which affects speed or torque—these are called semi-automatic non-torque-adjustable types. Pneumatic screwdrivers typically include an air motor, impact device, or gear reducer. Thanks to their fast speed, high efficiency, and low heat generation, they are widely used in industrial assembly. **Design and Handling:** The housing of electric screwdrivers is usually made of plastic, offering an ergonomic design that is lightweight and comfortable for long use. In contrast, pneumatic screwdrivers often have metal casings, which may feel less comfortable in the hand compared to their electric counterparts. **Rotational Speed:** Electric screwdrivers typically operate at 1000–2000 RPM. However, since they use an electric motor, prolonged high-frequency operation may cause overheating. Pneumatic screwdrivers, on the other hand, can reach up to 2800 RPM and are driven by compressed air, allowing them to run for extended periods without overheating. **Torque Accuracy:** Electric screwdrivers use electronic braking systems, resulting in higher torque accuracy with a repeatability rate of less than 3%. Pneumatic screwdrivers rely on mechanical braking, and their torque stability depends on the air pressure. This can lead to a repeatability range of about 5–10%, although this can improve with proper air conditioning. **Energy Consumption:** Electric screwdrivers consume around 55W per hour. Pneumatic screwdrivers, however, use compressed air as their power source. With proper air system setup, each unit consumes approximately 0.28 m²/min of air, making them more energy-efficient and environmentally friendly. **Maintenance Costs:** Electric screwdrivers require periodic replacement of carbon brushes, usually once a year, depending on usage. Brushless models offer better durability and lower maintenance. Pneumatic screwdrivers have fewer consumables and require minimal daily maintenance. Regular oiling and blade replacement every year are typically sufficient. **Summary:** Electric screwdrivers are convenient, comfortable, and cost-effective, with high torque stability. However, frequent use may require brush replacements. Pneumatic screwdrivers are faster, safer, and more durable, with lower failure rates and energy efficiency. Their drawbacks include less ergonomic handling and potential torque fluctuations due to air pressure changes. Both electric and pneumatic screwdrivers offer torque adjustment features, but they cannot measure torque values themselves. For accurate testing, it's recommended to use a Yilite series torque tester. A 10-year professional manufacturer, Yilite offers reliable, easy-to-use torque testing solutions with guaranteed after-sales support. This information was provided by Ms. Mo from Dongguan Changan Key Electronics Factory. Contact: 0769-85492889.
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